TRW PML359 Brake Master Cylinder

Overview of TRW Brake Master Cylinder PML359

The TRW Brake Master Cylinder PML359 is engineered for precise hydraulic brake control in select Mercedes-Benz models. Designed with durable aluminum construction and a straight bore type, this master cylinder ensures reliable braking performance for vehicles like the Mercedes-Benz C43 AMG, E300, E320, and E430.

• Aluminum master cylinder material for strength and corrosion resistance
• 19.05 mm bore diameter with a straight bore design
• Includes dust boot and gasket or seal for protection and proper sealing
• Two mounting holes and two ports for secure installation and fluid flow
• Equipped with dual pistons for balanced brake pressure distribution

Detailed Product Description

The TRW PML359 brake master cylinder is a critical component in the brake hydraulics system, responsible for converting pedal force into hydraulic pressure. Its aluminum body offers durability and resistance to wear, while the 19.05 mm bore diameter and straight bore type provide consistent fluid displacement. This master cylinder includes a dust boot to protect internal components from contaminants and a gasket or seal to maintain a secure hydraulic system. Although it does not come with a reservoir, brake booster, or mounting hardware, it is designed to integrate seamlessly with the existing brake system of compatible Mercedes-Benz vehicles.

Compatible Vehicles and Applications

• Mercedes-Benz C43 AMG
• Mercedes-Benz E300
• Mercedes-Benz E320
• Mercedes-Benz E430

This part is ideal for replacing worn or damaged master cylinders in these models, ensuring proper brake fluid pressure and pedal feel.

Common Issues Addressed by TRW PML359

• Spongy or unresponsive brake pedal
• Brake fluid leaks around the master cylinder
• Inconsistent brake pressure causing uneven braking
• Brake pedal sinking or failure to maintain pressure
• Contaminated or damaged internal seals affecting performance

Installation Notes and Tips

When installing the TRW PML359, ensure the brake system is properly bled to remove air and maintain hydraulic integrity. Since mounting hardware and reservoir are not included, reuse existing components or source compatible parts separately. Verify the bore diameter and port thread size (M12 - 1.0) match your vehicle’s specifications. Handle the dust boot and gasket carefully to avoid damage during installation.

Quality Assurance and Warranty

TRW manufactures this brake master cylinder to meet OEM standards for fit and function. The aluminum construction and included seals contribute to long-term reliability. While specific warranty details are not provided here, TRW products typically come with manufacturer-backed warranties covering defects in materials and workmanship.